Invention Grant
- Patent Title: Purification of N-(2-hydroxyethyl)-2-pyrrolidone
- Patent Title (中): N-（2-羟乙基）-2-吡咯烷酮的纯化
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Application No.: US10973151Application Date: 2004-10-26
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Publication No.: US07238260B2Publication Date: 2007-07-03
- Inventor: Andrew P. Kahn , David W. Leyshon , Shaw-Chan Lin , Edward P. Carey
- Applicant: Andrew P. Kahn , David W. Leyshon , Shaw-Chan Lin , Edward P. Carey
- Applicant Address: US DE Greenville
- Assignee: Lyondell Chemical Technology, L.P.
- Current Assignee: Lyondell Chemical Technology, L.P.
- Current Assignee Address: US DE Greenville
- Agent William C. Long
- Main IPC: B01D3/14
- IPC: B01D3/14
Abstract:
N-(2-hydroxyethyl)-2-pyrrolidone (HEP) is purified by a distillation sequence in which the purified HEP is recovered as a side stream without being separated as an overhead at any point in the procedure.
Public/Granted literature
- US20060086602A1 Purification of N-(2-hydroxyethyl)-2-pyrrolidone Public/Granted day:2006-04-27
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